將gps左邊轉成百度座標，js方法，java方法。

js轉換方法

var resultPoint = GpsToBaiduPoint(new BMap.Point(data.lon, data.lat));
var ps = [];
ps.push(new BMap.Point(points[i].lon, points[i].lat));
var resultPoints = GpsToBaiduPoints(ps);

/**
 * 單個座標轉換
 * @param point
 * @returns {BMap.Point}
 */
function GpsToBaiduPoint(point){
    var _t = wgs2bd(point.lat,point.lng);
    var _BPoint = new BMap.Point(_t[1], _t[0]);
    return _BPoint;
}
 
/**
 * 批量座標轉換
 * @param points
 * @returns {Array}
 */
function GpsToBaiduPoints(points){
    var resultPoints = [];
    $.each(points,function(index,point){
        var _t = wgs2bd(point.lat,point.lng);
        var _BPoint = new BMap.Point(_t[1], _t[0]);
        resultPoints.push(_BPoint);
    });
    return resultPoints;
}
 
//////////////////////////////////////////
//////////////轉換核心代碼////////////////
//////////////////////////////////////////
var pi = 3.14159265358979324;
var a = 6378245.0;
var ee = 0.00669342162296594323;
var x_pi = 3.14159265358979324*3000.0/180.0;
 
 
//世界大地座標轉爲百度座標
function wgs2bd(lat,lon) {
    var wgs2gcjR = wgs2gcj(lat, lon);
    var gcj2bdR = gcj2bd(wgs2gcjR[0], wgs2gcjR[1]);
    return gcj2bdR;
}
 
function gcj2bd(lat,lon) {
    var x = lon, y = lat;
    var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
    var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
    var bd_lon = z * Math.cos(theta) + 0.0065;
    var bd_lat = z * Math.sin(theta) + 0.006;
    var result = [];
    result.push(bd_lat);
    result.push(bd_lon);
    return result;
}
 
function bd2gcj(lat,lon) {
    var x = lon - 0.0065, y = lat - 0.006;
    var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
    var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
    var gg_lon = z * Math.cos(theta);
    var gg_lat = z * Math.sin(theta);
    var result = [];
    result.push(gg_lat);
    result.push(gg_lon);
    return result;
}
 
function wgs2gcj(lat,lon) {
    var dLat = transformLat(lon - 105.0, lat - 35.0);
    var dLon = transformLon(lon - 105.0, lat - 35.0);
    var radLat = lat / 180.0 * pi;
    var magic = Math.sin(radLat);
    magic = 1 - ee * magic * magic;
    var sqrtMagic = Math.sqrt(magic);
    dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
    dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
    var mgLat = lat + dLat;
    var mgLon = lon + dLon;
    var result = [];
    result.push(mgLat);
    result.push(mgLon);
    return result;
}
 
function transformLat(lat,lon) {
    var ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.sqrt(Math.abs(lat));
    ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;
    ret += (160.0 * Math.sin(lon / 12.0 * pi) + 320 * Math.sin(lon * pi  / 30.0)) * 2.0 / 3.0;
    return ret;
}
 
function transformLon(lat,lon) {
    var ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.sqrt(Math.abs(lat));
    ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;
    ret += (150.0 * Math.sin(lat / 12.0 * pi) + 300.0 * Math.sin(lat / 30.0 * pi)) * 2.0 / 3.0;
    return ret;
}

 

java轉換方法
 

public static void main(String[] args) {
//        double[] local = GpsToBaiDuXY.wgs2bd(126.50111324097671,45.88024762976107);126.488445 45.871875
        double[] local = GpsToBaiDuXY.wgs2bd(45.871875,126.488445);
        System.out.println(local[0]);
        System.out.println(local[1]);
    }
    
    static double pi = 3.14159265358979324;
    static double a = 6378245.0;
    static double ee = 0.00669342162296594323;
    public final static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
 
    public static double[] wgs2bd(double lat, double lon) {
           double[] wgs2gcj = wgs2gcj(lat, lon);
           double[] gcj2bd = gcj2bd(wgs2gcj[0], wgs2gcj[1]);
           return gcj2bd;
    }
 
    public static double[] gcj2bd(double lat, double lon) {
           double x = lon, y = lat;
           double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
           double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
           double bd_lon = z * Math.cos(theta) + 0.0065;
           double bd_lat = z * Math.sin(theta) + 0.006;
           return new double[] { bd_lat, bd_lon };
    }
 
    public static double[] bd2gcj(double lat, double lon) {
           double x = lon - 0.0065, y = lat - 0.006;
           double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
           double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
           double gg_lon = z * Math.cos(theta);
           double gg_lat = z * Math.sin(theta);
           return new double[] { gg_lat, gg_lon };
    }
 
    public static double[] wgs2gcj(double lat, double lon) {
           double dLat = transformLat(lon - 105.0, lat - 35.0);
           double dLon = transformLon(lon - 105.0, lat - 35.0);
           double radLat = lat / 180.0 * pi;
           double magic = Math.sin(radLat);
           magic = 1 - ee * magic * magic;
           double sqrtMagic = Math.sqrt(magic);
           dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
           dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
           double mgLat = lat + dLat;
           double mgLon = lon + dLon;
           double[] loc = { mgLat, mgLon };
           return loc;
    }
 
    private static double transformLat(double lat, double lon) {
           double ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.sqrt(Math.abs(lat));
           ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
           ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;
           ret += (160.0 * Math.sin(lon / 12.0 * pi) + 320 * Math.sin(lon * pi  / 30.0)) * 2.0 / 3.0;
           return ret;
    }
 
    private static double transformLon(double lat, double lon) {
           double ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.sqrt(Math.abs(lat));
           ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
           ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;
           ret += (150.0 * Math.sin(lat / 12.0 * pi) + 300.0 * Math.sin(lat / 30.0 * pi)) * 2.0 / 3.0;
           return ret;
    }